King Koil Whisper Rock Extra Firm

Experience a deep and rejuvenating night’s sleep when the Intimate Whisper Rock Extra Firm mattress responds to every inch of your body’s curves each and every night. Sophisticated designs and construction along with the latest in responsive and conforming foam technologies resting on responsive pocketed coil system, is why you will fall in love with sleep again.

Extra Firm Mattress-Layered with exclusive foams and Superior materials to give you the perfect support you need.
King Koil mattresses are for people who are ready to invest into a better quality of sleep and to better the planet for future generations.

PureCare Silver five Sided Mattress Protector

from $110.00

get it Delivery date contingent on available inventory

Healthy Sleep Ultra-Tech Advanced Pillow

from $99.00

get it Delivery date contingent on available inventory

Add it

Multiple Colors

DreamFit Pima Cotton Sheets

from $129.99

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Add it

subtotal:

$1,999.99

get it Delivery date contingent on available inventory

Local
Delivery

Local delivery and set up is included for a flat fee of $69.99 within 25 miles of any Sit ‘n Sleep store.

We will also "haul away" your old mattress and box spring upon delivery of your new order: Just let us know!

Next day delivery on available inventory. Not applicable for UPS and FedEx orders. See our COVID-19 page for more information.

120-Night Sleep Trial

Buying a new mattress is not something you do everyday. Our 120-night sleep trial and comfort guarantee means you can rest easy.

10 Year Warranty

You spend a third of your life asleep on your mattress. Shouldn't you at least lay on it first? Come visit one of our 39 store locations and get comfy with your purchase.

Mattress Removal

We will "haul away" your old mattress and box spring upon delivery of your new order: Just let us know if you would like this service.

Add a Base and Frame:

Knickerbocker Promo Frame

from $67.00

get it Delivery date contingent on available inventory

Primo Rapid Foundation

from $299.99

get it Delivery date contingent on available inventory

Sealy Ease 4.0 Adjustable Base

from $899.00

get it Delivery date contingent on available inventory

Have Questions?

We're here to help. Give us a call or visit your local store.

Extra Firm

Extra Firm Mattress-Layered with exclusive foams and Superior materials to give you the perfect support you need.

Key Feature

Hand applied button tufts

Ready for Your Best Night’s Sleep?

TAILORMADE TUFTING™

SILK WOOL BLEND

GRAPHITE TALALAY FIRM LATEX

825 CONTOURFLEX ENCASED COIL SYSTEM

Mattress is adjustable friendly - works well on motion bases.

Mattress Height (Approx.) 14.5”

10 Year Warranty

TAILORMADE TUFTING™

  • years of consistent support
  • handcrafted comfort
  • extends the life of the mattress

SILK WOOL BLEND

  • natural & breathable
  • durable cooling comfort
  • sustainable

GRAPHITE TALALAY FIRM LATEX

  • pressure relieving support
  • highly resilient & durable
  • wicks away moisture & heat

825 ContourFlex Encased Coil System

  • reduces motion disturbance
  • conforms to body’s curves
  • relieves body pressure points

Approx. 

Twin 38" x 75" x 14.5"

Twin XL 38" x 80" x 14.5"

Full 54" x 75" x 14.5"

Queen 60" x 80" x 14.5"

King 76" x 80" x 14.5"

CA King 72" x 84" x 14.5"

What Customers Are Saying